package com.sky.aspect;

import com.sky.anno.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 定义切面类
 */
@Component
@Aspect
@Slf4j
public class AutoFillAspect {
    @Pointcut("@annotation(com.sky.anno.AutoFill)")
    public void autoFillPointcut() {
    }

    /**
     * 前置通知
     */
    @Before("autoFillPointcut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("统一填充");
        //获取拦截方法的类型
        MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();//获取方法签名对象
        AutoFill autoFill = methodSignature.getMethod().getAnnotation(AutoFill.class);//获取注解对象
        OperationType operationType = autoFill.value();//获取数据库操作类型

        //获取拦截参数
        Object[] args = joinPoint.getArgs();
        Object entity = args[0];
        //准备赋值的数据
        LocalDateTime now = LocalDateTime.now();
        Long id = BaseContext.getCurrentId();
        //根据不同类型,通过反射赋值
        if (operationType == OperationType.INSERT) {
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //通过反射赋值
                setCreateTime.invoke(entity, now);
                setCreateUser.invoke(entity, id);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, id);
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else if (operationType == OperationType.UPDATE) {
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //通过反射赋值
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, id);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}